Conveners
Symmetries: Lepton flavour
- Claude Amsler (Austrian Academy of Sciences (AT))
Symmetries: Lepton flavour
- Claude Amsler (Austrian Academy of Sciences (AT))
Symmetries: eDM
- There are no conveners in this block
Symmetries: eDM
- Ben Sauer
Symmetries: Hadronic reactions
- Claude Amsler (Austrian Academy of Sciences (AT))
Symmetries: Molecules
- Lorenz Willmann
Symmetries: Leptonic reactions
- Eberhard Widmann (Austrian Academy of Sciences (AT))
Symmetries: Parity tests
- Hartmut Abele (TU Wien)
Symmetries: Neutrinos
- Livia Ludhova
Symmetries: Neutrons
- Hirohiko Shimizu (Nagoya University)
Symmetries: Magnetic moments
- Hirohiko Shimizu (Nagoya University)
Symmetries: Matter-antimatter symmetry
- Paolo Crivelli (ETH Zurich (CH))
Symmetries: BSM
- Ralf Lehnert
Symmetries: BSM
- Eberhard Widmann (Austrian Academy of Sciences (AT))
The rate of semitauonic and electroweak penguin decays in the B sector
show hints of lepton-flavour universality violation. Belle and Belle II
data is well suited to probe such anomalies. The low-background
collision environment along with the possibility of partially or fully
reconstructing one of the two B mesons in the event offer high precision
measurements of semileptonic and...
The BESIII experiment has collected an integrated luminosity corresponding to 2.93 fb$^{-1}$ of data at 3.773 GeV, and 6.3 fb$^{-1}$ of data between 4.18 and 4.23 GeV, respectively, which allows for precision tests with D meson decays. We will present an overview of the recent results on lepton flavour universality tests with (semi-)leptonic decays of charmed mesons. We will also report the...
The Mu2e experiment at Fermilab will search for a neutrino-less muon to electron conversion with a single event sensitivity of ~3E-17. This is an improvement of four orders of magnitude in sensitivity over the current best limit. Mu2e will indirectly probe a broad class of New Physics models with mass scales up to 10,000 TeV. The Mu2e is currently under the construction with a goal to start...
The TUCAN collaboration is building a next generation ultracold neutron (UCN) source, based on spallation neutron production using protons from TRIUMF's 500 MeV cyclotron. A large cold neutron flux is created via moderator shells of room-temperature heavy water and 20-K liquid deuterium surrounding a near-spherical volume of superfluid liquid helium-4. At around 1 K, the ultracold neutrons...
abstract provided as attached pdf-file
The hyperons from charmonia decays are produced with a non-zero spin polarization that is described by one global parameter in electron-positron annihilation into hyperon-antihyperon pair. This provides a method to measure precisely parity-violating (anti)hyperon decay amplitudes and directly test CP violation. These CP tests were performed for J/psi decays into Lambda Lambdabar, Sigma+...
We present recent results of charm $CP$ symmetry violation (CPV) based on about 1 ab$^{-1}$ collected at the Belle experiment, including the decay asymmetry parameters ($\alpha$) and $\alpha$-included $CP$ asymmetry ($A_{CP}^{\alpha}$) for decays of $\Lambda_c^+$ and $\Xi_c^0$ baryons, search for CPV via time-integrated $CP$ asymmetry in $D$ three-body decays and T-odd asymmetry in $D$...
KLOE and KLOE-2 full data sample, corresponding to 8 fb−1, has been collected at the Frascati DAΦNE φ–factory of INFN Laboratories and repre- sents the world largest data sample of this kind: about 2.4 × 1010 φ mesons and 8 × 109 K0K ̄ 0 entangled pairs. The neutral kaon system has unique properties such as entanglement, flavour oscillations, charge-parity (CP) and time-reversal (T) violation...
In the talk we demonstrate test of combined charge, parity, and time-reversal transformation (CPT) in the annihilations of the lightest leptonic bound system, the positronium atom. With the Jagiellonian Positron Emission Tomograph (J-PET) we have collected an unprecedented range of kinematical configurations of exclusively-recorded annihilations of the positronium triplet state...
The so called Standard Model is a phenomenological model, in the sense that it relies on experimental input and has been continuously refined, based on that input, for the better part of a century. It is generally accepted that the Standard Model is incomplete,for various reasons.
The Standard Model is a gauge theory, which produces floating parameters, called couplings, or "charges", for...
The high measurement precision attainable in experiments within the so-called low-energy, precision frontier can be employed to carry out a range of tests of fundamental physics and search for beyond-standard-model physics. After a brief overview of precision, low-energy tests, I will discuss two related experiments. In one of these, we study isotope shifts in an optical transition in...
Neutrons are electrically neutral and massive particles. They experience all known forces, which are electromagnetic, gravitation, weak, and strong forces. Slow neutrons with low kinetic energy are good tools for observing the effects of those interactions. They are used for various fundamental physics experiments, taking advantage of the property.
Depending on their kinetic energy, slow...
Particle/Antiparticle asymmetry (CP violation) was discovered almost six decades ago in quark bound states. CP violation was the only experimental evidence of matter and antimatter behaving differently in the Standard Model of particle physics. The discovery of neutrino oscillations at the end of the last century opened the window for similar phenomena in leptons. It has taken the neutrino...
CPT symmetry, the combination of Charge Conjugation, Parity and Time reversal, is a cornerstone of our model building strategy and therefore the repercussions of its potential violation will severely threaten the most extended tool we currently use to describe physics, i.e. local relativistic quantum fields. However, limits on its conservation from the Kaon system look indeed imposing. In this...
The Fermilab muon g-2 experiment recently released its first measurement of the positive muon magnetic moment anomaly, a_mu = (g_mu-2)/2 to an accuracy of 0.46 ppm. The anomaly a_mu is of interest since it can be predicted with impressive precision and its value is sensitive, via quantum corrections, to the interactions of the muon with the other particles of the Standard Model. Comparison of...
Throughout its existence, the Standard Model has proven very successful in describing fundamental interactions of elementary particles. However, the asymmetry between the abundance of matter and antimatter in the universe has yet to be understood.
The BASE experiment, located at CERN’s Antiproton Decelerator (AD) facility, measures the fundamental properties of protons and antiprotons to test...
Three mysteries stand after the discovery of the Higgs boson: (i) the
origin of the masses of the neutrinos; (ii) the origin of the baryon
asymmetry in the universe; and (iii) the nature
of dark matter. High energy colliders provide an exciting opportunity to
resolve these mysteries with the possible discovery of heavy neutral
leptons (HNLs), both at the HL-LHC from neutrinos produced...
Lorentz and CPT symmetry represent cornerstones of our present understanding of nature, but may be violated in various theoretical approaches to underlying physics. Testing these symmetries therefore establishes a promising avenue to search for physics beyond the Standard Model. The canonical theoretical tool to identify possible experimental signatures of such violations is an...
In this contribution, we discuss the precision theory of the bound-electron g factor. This quantity can be measured nowadays to high precision with the combination of Penning traps and electron beam ion traps. The collaboration of theory and experiment enables impactful and detailed tests of quantum electrodynamics in a strong background field, and a competitive determination of fundamental...
I discuss novel mechanisms for the generation of electric dipole moments in atoms and molecules, including via the exchange of low-mass axionlike particles between atomic electrons and nucleons [1,2], as well as via two-photon exchange processes between atomic electrons and the nucleus in paramagnetic systems [3]. I also discuss how oscillating electric dipole moments may be induced...
